头季稻后期营养器官碳水化合物含量对再生稻的影响

EFFECT OF CARBOHYDRATE CONTENT OF VEGETABLE ORGANS IN MAIN CROP AT THE LATE PERIOD OF RATOON1NG RICE

通过对头季稻后期营养器官碳水化合物(TCC)含量的测定、调节和不同含量下再生稻农艺性状的考察,结果表明:头季稻后期茎鞘贮藏TCC浓度变化与生育进程是二次回归关系,并与全保留茎鞘稻桩的单茎再生苗、穗数和再生稻株高、穗长、穗平着粒、实粒、千粒重、单株产量均呈正相关;剪叶留穗后的茎鞘TCC含量,与上述再生稻性状也呈正相关;随冠层叶位的下降,叶片对再生稻的效应逐渐减弱;TCC含量增加,对再生稻生育进程有明显的促进作用。

Through determining and regulating carbohydrate content of vegetative organs in main crops at the period and observing the agronomic traits of ratooning rice in various carbohydrate content, the results showed as followed; the correlation between the change of carbohydrate concentration in the stem and leaf sheath of the main crop and the growth progress is quadratic regression and positive correlation to the ratooning tillers and spike per stem, ratooning plant height, spike length, grains per spike, 1000-grain weight and grain weight per plant in rice stalks with intact leaf sheath; The correlations between the trait of ratooning plant as above mentioned and carbohydrate content in leaf sheath of main crop as well as carbohydrats assimilation in leaf sheath when leaves clipped and spike reserved ars positive, vise; as the crown leaf position declined, the effect of leaf on ratooning rice weakened; Enhancing carbohydrate content in the stem and leaf sheath of main crop is benificial to promote the growth progress of ratooning rice.